Title: Linearity of the electromechanical penile plethysmograph's output at large expansions.
Authors: Richards, Jeffrey C.; Kalucy, Ross S.; Wood, Michael M.; Marshall, Villis R.
Abstract: Despite the widespread use of the Barlow-type electromechanical plethysmograph for monitoring changes in penile circumference, doubts have arisen about its sensitivity at large expansions. This study investigated the linearity of both a used and unused gauge over a wide range of standardized expansions. For both gauges, the relationship between electrical output and physical expansion was almost linear. A logarithm mic 10 transformation on the physical expansion data did not for either gauge achieve perfect linearity. Contrary to suggestions in the literature, therefore, such a transformation is not required when using this gauge.
Subjects: PLETHYSMOGRAPHY; BLOOD circulation; TISSUE expansion; PENIS; LITERATURE; LOGARITHMS
Publication: Journal of Sex Research, 1990, Vol 27, Issue 2, p283
ISSN: 0022-4499
Publication type: Academic Journal
DOI: 10.1080/00224499009551557

Linearity of the electromechanical penile plethysmograph's output at large expansions.

Richards, Jeffrey C.; Kalucy, Ross S.; Wood, Michael M.; Marshall, Villis R.